Quote:
Originally Posted by MightyMouseTech
When we hook up ISTA to a car now, which is required for ANY warranty work, it can now tell if the car has been flashed, and will pop up a warning for "engine tuning". So BMW will know instantly.
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Yes, it looks for certain things like overrev conditions, flash counter, ect. However savvy tuners know what values they need to not change to avoid triggering this.